Bile Acid tests are not reliable if a dog is taking prednisone. Results will always be higher than what would be normal for her. It would be a waste of money to pursue futher testing until she is off the prednisone, and with all things considered, I highly doubt she has a liver problem at all. Dogs with Shunts usually test over 100. Under 100 they may have MVD, and is controlled through diet, and medications, if needed. MVD doesn't make them lethargic or sick. Many show low weight (just look skinny) and may be very picky eaters.
I would not get her spayed until all symptoms of False Pregnancy are gone. If dogs are spayed while in FP, there is increased risks of bleeding, and the symptoms will take longer to resolve, by a month or more. Warm compresses on her mammary glands may help her.
On ultrasound, most livershunt dogs have smaller than normal livers. Hers appeared normal.
Royal Canin is a high protein diet... she may do better on food that is 18% -22% protein. High protein makes the liver work harder.
Did the vet find anything in the urine sediment? Normally they look for red and white blood cells, crystals, and casts and they test the urine for other things as well. I would think any stones would have been seen in the ultrasound. Has she been urinating more frequently or straining to urinate?
Have you noticed any difference since giving her the Lactulose?
Last but not least, be sure her anal glands are not full. This can cause distressing behaviors in dogs. Also make sure any traces of blood are gone from her vulva (from her heat). Is she still swollen? Sometimes hairs can work their way in and cause irritation and even cause a urinary tract infection.
You can add some water to her food to increase her intake.
A dog in heat can appear to be so different than the dog you knew prior to going into heat. Personality and behavior can change drastically. A False Pregnancy doesn't help matters either, but she will return to her normal self when this all passes.
I will warn you about chew type toys/treats... if a dog bites off a chunk that is on the big side, it can be painful as it goes through their system and may take a few days to pass. Large pieces can also cause blockages in these little dogs, and are a choking hazard.
And, concerning vaccines...
http://www.yorkietalk.com/forums/yor...-overview.html
Lepto is not recommended for small breed dogs, and Coronavirus is not a threat to adult dogs, only young puppies.
Is she feeling any better yet?